Top 10 Fundamental Photography Concepts

The focal length of a lens is measured in millimeters (mm) and is usually indicated on the lens itself. Different lenses cover different focal length ranges, each designed for specific photographic purposes.

A short focal length gives you a wider field of view, allowing you to capture more of the scene, while a longer focal length narrows the field of view and results in a smaller frame. However, a long focal length enables the photographer to shoot from a distance and zoom in on a subject without getting closer. Moreover, the narrower field of view can help draw the viewer’s attention to the main subject of the photo.

In summary, depending on the desired outcome—whether shooting landscapes, portraits, or other subjects—photographers need to carefully select the appropriate focal length range to achieve the perfect composition and interaction between the subject and the environment.

The image sensor is often considered the 'soul' of the camera because it determines the size, resolution, sensitivity range, and lens compatibility. Its main function is to capture light and transform what you see through the viewfinder or on the LCD screen into a photograph.

There are two common types of image sensors: CCD and CMOS. CCD sensors offer superior image quality with better light sensitivity and noise control. However, they have the disadvantage of being more difficult to assemble and consuming more power. On the other hand, CMOS sensors surpass CCDs with their efficient energy usage, faster image capture, and overall better performance, even under high-speed conditions.

Simply put, white balance refers to the color temperature of your photo. Sometimes, you might notice a photo with a blue or yellow tint. This usually happens when the camera misinterprets the lighting or is affected by surrounding colored lights.

To explain color temperature in simpler terms, it’s measured in Kelvin (K) and ranges from 1000 to 10,000. At 1000K, the light will appear reddish-orange, and as the temperature increases, it shifts through yellow, green, and blue hues. For a clearer understanding, you can refer to the illustration below.

Photography fundamentally revolves around exposure. A camera is like a dark box. When you press the shutter, a door opens, allowing light to enter through the lens and strike the image sensor. The photograph can be broken down into two main elements: brightness and light balance. Think of the image sensor as a collector of light. The overall brightness of an image is determined by the amount of light the sensor absorbs. If too much light enters, the image will become overexposed and appear washed out, whereas insufficient light results in a dark and underexposed image.

An image with the right brightness for the subject is considered properly exposed. In addition to brightness, how the light is balanced across the image can significantly alter the result, even when the exposure remains the same. The amount of light captured by the sensor is called the Exposure Value (EV).

Many people overlook the MF lens and its Manual Focus function. You can check out articles like 'Should You Buy an MF Lens?' to help you make an informed decision. It's no coincidence that brands like Sony and Fujifilm are introducing features to support older film lenses for use with their modern camera systems.

I've spent a significant amount of time using MF lenses on my Sony camera, and I've been really impressed with the results. The quality is fantastic, and it provides some unique effects. Of course, the price is just a fraction of what you'd pay for modern AF lenses.

Depth of Field (DOF) refers to the amount of background blur you get from a lens. The more blur you have, the shallower the DOF. For example, a telephoto lens with a longer focal length will create a shallower DOF compared to a wide-angle lens with a shorter focal length. A shallow DOF can make your subject stand out with beautiful background blur, but the downside is that it's easier for the focus to be missed due to the thin depth of field.

To achieve better results, try using a faster shutter speed and, if necessary, increasing the ISO. When shooting landscapes, it's best to close your aperture to around F/8 or smaller to ensure sharp focus throughout the image.

Cameras offer various autofocus modes, and the best choice depends on the subject and the number of people in the frame. For portrait photography, it's recommended to use single-point autofocus and focus on the subject's eyes.

If you're capturing a larger group, you might opt for 3D focus or use all available autofocus points on your camera. In such cases, you may also want to close the aperture to achieve a greater depth of field, ensuring sharp focus across all individuals. For landscape photography, you should select the mode that prioritizes all autofocus points to keep everything in focus.

Aperture, also known as F-stop, refers to the opening in the lens that allows light to reach the camera’s sensor or film. A larger aperture lets in more light, while a smaller one allows less light. In simple terms, aperture is the size of the opening in the lens that captures the image when you press the shutter button.

Common aperture settings include f/1.4, f/1.8, f/3.2, and f/22. It's important to note that a larger aperture (like f/1.4) corresponds to a smaller f-number, while a smaller aperture (like f/22) has a larger f-number. In short, a wider aperture lets in more light, brightening your image and allowing for faster shutter speeds, which results in sharper images. Additionally, the f-number will be lower for larger apertures.

Shutter speed, often referred to as the capture speed, determines how long the camera’s shutter remains open to capture light. A slower shutter speed can cause the image to blur (due to camera shake or moving subjects), while a faster shutter speed allows you to freeze fast-moving moments with sharp clarity (like capturing a falling water droplet).

A handy trick for beginners shooting handheld is to double the focal length (e.g., with a 60mm lens, use a shutter speed of 1/120s or faster) to avoid blur. However, slower shutter speeds can be creatively used to introduce intentional motion blur, creating dynamic effects and light trails in your images.

In short: The slower the shutter speed, the more light enters, brightening your image, but it also risks blur from camera shake or moving subjects.

ISO, short for International Organization for Standardization, defines the sensitivity of your camera's sensor to light, allowing you to capture images without relying on a flash. A higher ISO setting makes your photos brighter, but it also increases the likelihood of graininess or noise. Typically, digital cameras have ISO ranges between 50 and 25,600.

In short: On bright sunny days, keep your ISO between 100 and 200. When shooting in low-light conditions, consider raising the ISO rather than using a flash to preserve the natural feel of the scene.